V6R VRF 50Hz
29
P
art
3
- Con
tr
ol
4.3
Startup Control for Cooling Only/Main Cooling Operation
Table 3-4.1: Component control during startup in cooling only/main cooling mode
Component
Wiring
diagram
label
Before startup
1
Startup control
STEP1
STEP2
STEP3
ODU
Inverter
compressor A
INV1
0Hz
0Hz
Initial step for 30S, then+8Hz×Nstep /
10S. (Until it reaches Pc_max-Pe_min ≥
0.2MPa)
8-10HP 42Hz, 12-
22HP 51Hz, 24-34HP
88HZ, 36-60HP
138Hz,
then adjust according
to the high pressure
and low pressure etc.
Inverter fan 1
FANA
0 Step
0 step
Start: 0 step, then adjust by the high
pressure and low pressure
PI control
Inverter fan 2
FANB
Four way valve ST1
Maintains previous
position
Determined based on the initial mode of the heat exchanger
Electronic
expansion valve
EEVA
0pls
Compressor operation, 2880pls
Compressor not operation, initial 135pls, then adjusted according to the
module temperature NTC.
EEVC
0pls
0pls
Compressor operation, 17pls→ +8pls per 20S based on high
pressure or discharge temperature.
Compressor not operation, 0pls.
Solenoid valve
SV5
OFF
ON
SV8A
OFF
OFF
Compressor operation, ON
Compressor not operation, OFF
SV7
OFF→ON for 1min ON
ON if Pc≥3.3MPa or Pe
<
0.18MPa, else OFF.
MS01
Electric
ball
valve
EVBA
OFF
Control based on IDUs’ mode
EVBB
OFF
EVBC
OFF
2950pls
Electronic
expansion valve
EEVA
240 pulse
0pls
MS04-12
Solenoid valve
SV(n)A
OFF
Control based on IDUs’ mode
SV(n)B
OFF
SVP
OFF
OFF
Electronic
expansion valve
EEVA
240pls
0pls
IDU
Fan
Fan
0 step
Setting speed by owners
Electronic
expansion valve
EEV
300pls (500P EEV)
1200pls (2000P
EEV)
500P EEV IDU: Maintain 300pls for 5min
2000P EEV IDU : Maintain 1200pls for 5min
Ending conditions
60S
End if startup time arrives 5 min or the minimum superheat of discharge
temperature ≥10°C or Tc_max > 50°C.
Notes:
1.
The period for restarting after stopping is 7min when is necessary to equalize the pressure in the whole system.